Large Radius Bends Sheet Metal

Recommended inside bend radius for sheet metal parts should be equal to material thickness.

Large radius bends sheet metal.

It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii. Step bending large radii. We recommend a minimum bend radius of 1t for all sheet metal parts. The multi breakage phenomenon occurs in some large radius air bending operations more commonly in thicker sheet metal and less commonly in materials with higher tensile strengths.

The best option may be to use a step bending process. While rolling the bend in a slip roller always is an option if you have one rolling is not the most accurate way to place a large radius in a precision part. Step bending or bump bending is a method for forming a large bend radius in a sheet metal part without the need for special tooling by creating a series of highly open bends in close proximity. Using protective gloves hold the free end of the metal sheet with one hand and with the other hand use a mallet or hammer to begin bending the sheet down and around the curved radius of the wood form.

This is putting a simple hem on a curved piece of zinc with a 7ft radius. Crca inside bend radius equal to 0 65 times of sheet thickness is also enough. The final quality depends on the number of bends and the step between them. Step bending is a procedure in which multiple hits bends are made along the entire length of the inside radius to produce the bend.

Bend radii minimum bend sizes. This method will have advantages over using a roller because the length of the rolled section can be controlled more precisely with high repeatability. Use this document to choose values that are both manufacturable and meet your needs. Also called bump bending this method uses many v bends in succession to get a large radius for your workpiece.

Thus the smallest radius of any bend in a sheet should be at least equal to the thickness of the sheet. Below is xometry s minimum bend radius reference table which is based on. This means that the phenomena is less likely to occur in a thinner sheet of stainless steel and will be more pronounced in a thicker sheet of cold rolled steel. Make sure the first bend mark lines up exactly with the curve in the form so that the bending will begin in the right spot.

For example if the thickness of the sheet is 1 mm the minimum bend radius should be 1 mm.